Yamaha 2011 FZ8NA(C) Service Manual page 460

b. Measure the stator coil resistance.
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EAS28170
CHECKING THE RECTIFIER/REGULATOR
1. Check:
• Rectifier/regulator input voltage
Out of specification → Correct the stator
coil condition.
Refer to "CHECKING THE STATOR
COIL" on page 8-110.
Rectifier/regulator input voltage
above 14 V at 5000 r/min
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a. Set the engine tachometer to the ignition
coil of cylinder #1.
b. Connect the pocket tester (AC 20 V) to the
rectifier/regulator coupler as shown.
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
• Positive tester probe
White "1"
• Negative tester probe
White "2"
• Positive tester probe
White "1"
• Negative tester probe
White "3"
• Positive tester probe
White "2"
• Negative tester probe
White "3"
ELECTRICAL COMPONENTS
c. Start the engine and let it run at approxi-
mately 5000 r/min.
d. Measure the rectifier/regulator input volt-
age.
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2. Check:
• Rectifier/regulator output voltage
Out of specification → Replace the recti-
fier/regulator.
Rectifier/regulator output volt-
age
14.2–14.8 V
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a. Set the engine tachometer to the ignition
coil of cylinder #1.
b. Connect the pocket tester (AC 20 V) to the
rectifier/regulator coupler as shown.
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
• Positive tester probe
Red "1"
• Negative tester probe
Black "2"
c. Start the engine and let it run at approxi-
mately 5000 r/min.
d. Measure the rectifier/regulator output volt-
age.
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8-111